The initial setting time for ordinary Portland cement as per IS specifications should not be less than_____________?

Related Mcqs:

1. As per IS specifications, the maximum final setting time for ordinary Portland cement should be_______________?

   A. 30 minutes
   B. 1 hour
   C. 6 hours
   D. 10 hours

2. According to IS specifications, the compressive strength of ordinary portland cement after three days should not be less than________________?

   A. 7 MPa
   B. 11.5 MPa
   C. 16 MPa
   D. 21 MPa

3. The main constituent of cement which is responsible for initial setting of cement is_________________?

   A. dicalcium silicate
   B. tricalcium silicate
   C. tricalcium aluminate
   D. all of the above

4. Addition of pozzolana to ordinary Portland cement increases__________________?

   A. bleeding
   B. shrinkage
   C. permeability
   D. heat of hydration

5. The normal consistency of ordinary Portland cement is about________________?

   A. 10%
   B. 20%
   C. 30%
   D. 40%

6. For testing compressive and tensile strength of cement, the cement mortar is made by mixing cement and standard sand in the proportions of___________________?

   A. 1:2
   B. 1:3
   C. 1:4
   D. 1:6

7. The main ingredients of Portland cement are________________?

   A. lime and silica
   B. lime and alumina
   C. silica and alumina
   D. lime and iron

8. Crushing strength of a first class brick should not be less than_____________?

   A. 3.5 N/mm2
   B. 7.0 N/mm2
   C. 10.5 N/mm2
   D. 14.0 N/mm2

9. The constituent of cement which is responsible for all the undesirable properties of cement is____________?

   A. dicalcium silicate
   B. tricalcium silicate
   C. tricalcium aluminate
   D. tetra calcium alumino ferrite

10. The maximum quantity of calcium chloride used as an accelerator in cement in percentage by weight of cement is_______________?

    A. 1
    B. 2
    C. 3
    D. 4